辛基羟肟酸浮选氟碳铈矿机制研究  

Flotation Mechanism of Octyl Hydroximic Acid on Bastnaesite

作　　者：饶金山[1] 何晓娟[1] 罗传胜[1] 陈志强[1] 

机构地区：[1]广州有色金属研究院稀有金属分离与综合利用国家重点实验室,广东广州510650

出　　处：《中国稀土学报》2015年第3期370-377,共8页Journal of the Chinese Society of Rare Earths

摘　　要：采用纯矿物浮选的方法,以松醇油为起泡剂,研究了氟碳铈矿在辛基羟肟酸钠为捕收剂体系下的浮选行为,在p H=7~11范围内,氟碳铈矿回收率大于96%,尤其在p H=9附近,氟碳铈矿的可浮性最好,回收率接近100%;采用傅立叶红外光谱（FT-IR）和X射线光电子能谱（XPS）手段进行作用机制研究,红外光谱表明,辛基羟肟酸钠在氟碳铈矿表面发生了化学吸附;XPS结果表明,氟碳铈矿表面可能只存在-C=O-RE-O-N-一种五元环螯合物;结合La3＋和Ce3＋离子溶液化学和氟碳铈矿浮选行为,推测La（OH）2＋,La（OH）2＋,Ce（OH）2＋和Ce（OH）2＋是存在于氟碳铈矿表面的浮选活性点,并推测了辛基羟肟酸在氟碳铈矿表面作用的模型。The floatation behavior of bastnaesite was studied in the system of octyl hydroximic acid（ OHA） being collector and pine oil as frother by the pure mineral flotation. In the p H range of 7 ~ 11,the recovery of bastnaesite is over 96%,the floatability of bastnaesite is the best and the recovery of bastnaesite is close to 100% especially atp H = 9. Flotation mechanism was studied by measurements of FT-IR and XPS. According to FT-IR test,chemical adsorption took place between OHA and bastnaesite. While according to XPS,may be only one kind of 5 ring member chelate- C = R- RE- O- N- exist on the surface of bastnaesite. Combined the solution chemistry of La3 ＋and Ce3 ＋and flotation behavior of bastnaesite,it is concluded that the La（ OH）2＋,La（ OH）2 ＋,Ce（ OH）2＋and Ce（ OH）2 ＋are the flotation active points existing on the surface of bastnaesite. The react model of OHA on bastnaesite was speculated.

关 键 词：稀土矿 氟碳铈矿 辛基羟肟酸 XPS 机制研究 

分 类 号：TD955[矿业工程—选矿]